Warp stop-motion for looms.



No. 655,644. Patented Aug. 7, 1900. w. H. BAKER & F. E. KIP.

WARP STOP MOTION FOR LOOMS.

(Application filed Dec. 9, 1899.)

2 Sheets-Sheet l (No Model.)

INVENTORS g 0/1 @MLA 'ATTORNEY m: NORRIS vzfsns co, Pnorau'ma, WASHINGTON, o. c.

N SRN WITNESSES: /@/%/4;AW

OmQQGZmw No. 655,644. Patented Aug. 7, I900. W. H. BAKER &. F. E. KIP.

WARP STOP MOTION FOR LOOMS.

(Application filed Dec. 9, 1899.)

7 (No Model.)

2 Sheets-Sheet 2 WILLIAM H. BAKER, OF CENTRAL FALLS, RHODE ISLAND, AND FREDERIO E. KIP, OF MONTOLAIR, JERSEY.

WARP STOP-MOTION FQR LooMs.

SPECIFICATION forming part of Letters Patent N 0. 655,644, dated August 7, 1900. Application filed December 9, 1899. Serial No. 739,760. No model-J T ctZZ whom it may concern:

Be it known that we, WILLIAM H. BAKER, residing at Central Falls, Providence county, Rhode Island, and FREDERIO E. KIP, residing at Montclair, Essex county, New Jersey, citizens of the United States, have invented certain new and useful Improvements in Warp Stop-Motions for Looms, of which the follow-' ing is a specification.

This invention relates to the class of stopmotions for looms wherein the breaking of a warp-thread effects or permits the closure of an electric circuit which acts through suitable magneto-mechanical devices to stop the I 5 loom, and particularly to that class of such devices wherein a circuit-closing gravity-drop is suspended on the warp-thread and completes the operating electric circuit when the thread breaks or fails and allows the drop to fall and wherein a magnet in the circuit when excited serves to interpose a part between the knock-off lever and a going or vibrating part of the loom, thus causing the said vibrating or going part to free the shipper-lever.

This invention has for its object improvements in circuit-closing devices Which are carried by the heddles and in the magnetomechanical devices, all as will be hereinafter more particularly described.

In the accompanying drawings, which illustrate embodiments of the invention, Figure 1 is a diagrammatical sectional elevation of a loom embodying the invention; Fig. 2 is 3 5 a plan, on a larger scale, of a part of the loom,

showing the knock-off mechanisms; and Fig. 3 is a sectional elevation of the same. Fig. 4 is a fragmentary face view of one of the heddles, showing the drops carried thereby. 0 Fig. 5 is a vertical section of the same, and

Fig. 6 is a detail sectional view of the connections. Figs. 7, 8, and 9 are views similar to Fig. 5, illustrating slightly-modified construcions.

1 represents the warp-threads; 2, the reed; 8, the vibrating lay; 4, the breast-beam; 5, the knock-off lever, and 6 the shipper-lever. These parts are common in many looms. In Figs. 2 and 3 the ordinary weft-fork also is shown.

7 is a heddlc-frame, and 8 the heddle eyes or wires mounted in said frame in the usual manner and adapted to form the shed in the .warps.

The electrical circuit-closing device carried by the heddle may be constructed in various ways, all operating, however, in a similar manner. The construction illustrated in Figs. 1, 4, and 5 will be first described. On and extending across the upperpart of the heddle-frame 7 is a compound terminal consisting of a bar 9, forming one terminal, and

a strip of metal 10, set in the upper edge of .11 and supports it; If this thread breaks or fails from any cause, the weight of the drop causes the latter to fall until stopped by the upper and preferably inclined margin of the slot through which the compound terminal extends, said margin impinging on the terminal 10. This will connect the terminals 9 and 10 electrically, as the terminal 9 is normally in electrical contact with the drop.

The terminals 9 and 10 form parts of an open electric circuit of which the wires let are conductors, and this circuit includes a suitable generator 15 and the coils of an electromagmet 16.

The magneto-mechanical devices for stopping theloom will be best understood, perhaps, from an inspection of Figs. 2 and 3. The magnet 16 is represented as supported by a bracket 17 on the breast-beam 4, audits armature-lever 18, carrying the armature, is

hinged to said bracket and normally upheld by any suitable spring, as 19. Pivotally connected to the knock-off lever 5 in a position where it may rest by gravity on the armaturelever 18 is an arm 20, and on the lay or some other going part is a tappet 21, which normally passes under the arm 20 when the lay beats up. When a drop 11 falls and closes the circuit through the magnet 16, the-latter draws down its armature-lever and the arm descends with it, so that when the tappet 21 next advances it impinges on the-end of this arm and drives it and the knock-off lever back, thus displacing the shipper-lever and stopping the loom. By causing the tappet 21 t0 impinge on an arm, as 20, controlled by but not forming any part of the magnet structure, all strain on the latter from the blow is avoided. The arm may be slotted and be loosely coupled to the armature-lever, as indicated; but even this is not absolutely essential, as it may merely rest on the armaturelever, its own weight being relied on to keep it down.

The circuit-closing drop may be mounted in various ways. In Fig. 7 the drop 11 is represented as inverted with respect to the arrangement seen in Fig. 5, the compound terminal being below and the guide above."

In Fig. 8 the drop ll is represented as having a shoulder 22 on its upper end which comes in contact with the strip 10 when the drop falls, and in Fig. 9 the strip 1O is mounted on the side of the bar 9 and has a conducting wire or rod soldered to it for the shoulder 22 to impinge on. In Figs. 8 and 9 the drop .is guided in a slot in the bar 9.

The construction of the fixed magnet with the arm 20, upon which the tappet 21 impinges, mounted on the moving part and operating independently of the armature-lever, may be employed in any form of warp-stop or weft-supply mechanism where electromagnetic devices are employed.

Obviously there will be a drop on each warpthread, and the drops for the warp-threads controlled by any particular heddle will be carried by and move with that heddle. In Fig.- 1 only two heddles are shown; but any number can be used as Well. Figs. 4 and 6 illustrate a convenient means of making the connection between the conductors l4 and the respective terminals 9 and 10 of the compound terminal. The terminal 9 is secured directly to the wooden frame of the heddle, and a metal clip 23, secured to the terminal 10, is secured also to the wooden frame and has a binding-screw for the wire 14.

It will be noted that the leading feature of the circuit-closing device above described consists in the compound terminal on the heddle-frame and extending laterally across the same above (or below) the limits of the sheds formed in the warps, a guide-bar also extending across the heddle-frame above (or below) the warp-sheds and opposite to said terminal, and the gravity-drops guided on said terminal andguide-bar and extending vertically through the warps and beyond the limits of the sheds therein.

Having thus described our invention, We claim- 1. In an electrical warp stop-motion, the combination with a heddle-frame, of a compound terminal mounted on and extending transversely across the same, the heddlewires, and a plurality of circ nit-closing drops mounted, carried and guided by said terminal.

2. In an electrical warp stop-motion, the combination with a heddle-frame, of a compound terminal mounted on and extending transversely across the same, the heddle wires, and a plurality of circuit-closing drops mounted, carried and guided by said terminal, said drops having each a thread-aperture situated adjacent to the eye in the heddlewire opposite to it.

3. In an electrical warp stop-motion, the combination with a heddle-frame, of a compound terminal mounted on and extending transversely across the same, the heddle- -wires, and a plurality of circuit-closing drops mounted, carried and guided by said terminal, said drops extending vertically over the frame beyond the shed and having a guide on the heddle-frame opposite to the said ter-' minal.

4. In an electrical warp stop motion, the combination with a heddle frame and'wires, of a compound terminal mounted on the heddle-frame near one of its ends and extending across the same, and a guide on and extending across the heddle-frame near its other end, of slotted, circuit-closing, gravity-drops mounted on said terminal and the said guide, said drops having each a thread-aperture situated adjacent to the eye in the opposite heddle-wire.

5. In an electrical warp stop-motion, the combination with a heddle frame and wires, of a compound terminal mounted on the heddle-frame near its upper end so as to be above the shed, and a drop-guide, mounted on said frame near its lower end so as to be below the shed, of circuit closing drops carried and guided by said terminal and guide, said drops having each a thread-aperture adjacent to the eye in the opposite heddle-wire.

6. The combination with a heddle-frame of a loom, a loom-stopping mechanism, and an electric circuit controlling said stopping mech-' anism, of a compound terminal mounted on said heddle-frame, the same forming the terminals of the said circuit, a drop guide mounted on the heddle-frame, the heddlewires, and means for closing said circuit when a warp-thread fails, said means comprising a plurality of circuit-closing drops suspended on the respective warp-threads and carried and guided by said terminalat one end, and the drop-guide at the opposite ends of said drops, the latter extending vertically across the shed in the warp. V

7. The combination with a heddle-frame of a loom, of a compound terminal mounted on the frame above the shed in the warp, a dropguide mounted on said frame below the said shed, the heddle-wires, and a plurality of slotted, gravity, circuit-closing drops mounted on said terminal and drop-guide and extending above and below the limits of-the warp-shed, said drops having each a threadaperture situated below the said compound terminal.

8. In a loom, the combination with the breast-beam, the knock-oil lever 5, mounted to slide horizontally on the same for disengaging the shipper-lever, and the said shipper-lever, of the electromagnet on a non-going part of the loom, its armature and armature-lever, the arm 20, hinged atone end to the knock-off lever and resting loosely on the armature-lever, means for guiding said arm in its movements over said lever, and the tappet 21, on the lay, substantially as set forth.

9. The combination of a heddle-frame of a loom, of acompoun'd terminal moving in unison therewith, the heddle-Wires, and a plurality of circuit-closing devices guided by said terminal or bar and supported by the unbroken warp-threads.

10. The combination with the heddle-frame of a loom, of a compound terminal moving in unison therewith, drop devices guided on said terminal or bar, the same forming terminals of an electric circuit, the said circuit, and a loom-stopping mechanism, said loomst-opping mechanism being made inoperative by said drop devices when supported by unbroken Warp-threads and operative on the breaking of said Warp-threads.

11. The combination with the heddle-frame of a loom, the heddle-wir'es, and a compound terminal, of a plurality of gravity circuitclosing devices guided by said terminal or bar, the same extending above and below the limits of the warp-shed, said circuit-closing devices having each a thread-aperture situated adjacent to the eye of one of said heddlewires, said terminal or bar forming terminals of an electric circuit, and a loom-stopping mechanism, said loom-stopping mechanism made inoperative by said drop devices when supported by unbroken warp-threads and 0p-' Y erative on the breaking of said Warp-threads.

In Witness whereof We have hereunto signed our names, this 15th day of November, 1899, in the presence of two subscribing witnesses.

WILLIAM H. BAKER; FREDERIC E. KIlP.

Witnesses HENRY CONNETT, PETER A. Boss. 

